









2^6 



Analyfis of the Atr\ 







pirn 



of expanfion of a temperate air, I found by 

 inverting a fmall glafs bubble in water, a 

 little warmer than a Thermometer is, by 'ha- 

 ving its ball held fome time in the mouth, 

 which may reafonably be taken for the de- 

 gree of warmth in the cavity of the lungs. 

 When the bubble was cool , the quantity 

 of water imbibed by it was equal to | of 

 the cavity of the whole bubble. 



But when inftead of thefe frequent re- 

 cruits of frefli air, there is infpired an air, 

 furcharged with acid fumes and vapours, 

 which not only by their acidity contract: the flb* 

 exquifitely fcnfiblc veficles, but alfoby their M 

 groflhefs much retard the free ingrefs of the ::r.rr 

 air into the veficles, many of which are ex- aita 

 ceeding fmall, fo as not to be vifible with- feat 

 out a microfcope ; which fumes are alfo con- 

 tinually rebating the elasticity of that air ; ^, 

 then the air in the veficles, will by Exp. 107 

 and 108 lofe its elafticity very faft, and con- ^ ? 

 iequently the veficles will fall flat, notwith- ^, 

 {landing the endeavours of the extending 

 Thorax to dilate them as ufual ; whereby 

 the motion of the blood thro* the lungs, be- 



*« ( 



log Hopped, inftant death enfues. 



I* 



in, 







Which 



